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Finding the Fourth Proportional to 291,753.40, 437,623.70 and 81,385.40

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Solution

The fourth proportional to 291,753.40, 437,623.70 and 81,385.40 is: 122,076.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,753.40 : 437,623.70 = 81,385.40 : x
  2. Step 2: Convert to fraction form
    291,753.40/437,623.70 = 81,385.40/x
  3. Step 3: Cross multiply
    291,753.40x = 437,623.70 × 81,385.40
  4. Step 4: Simplify right side
    291,753.40x = 35,616,179,873.98
  5. Step 5: Solve for x
    x = 35,616,179,873.98/291,753.40
  6. Step 6: Final answer
    x = 122,076.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.